mirror of
https://github.com/moparisthebest/wget
synced 2024-07-03 16:38:41 -04:00
46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
dnl A placeholder for POSIX 2008 <stddef.h>, for platforms that have issues.
|
|
# stddef_h.m4 serial 1
|
|
dnl Copyright (C) 2009 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
AC_DEFUN([gl_STDDEF_H],
|
|
[
|
|
AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
|
|
AC_REQUIRE([gt_TYPE_WCHAR_T])
|
|
if test $gt_cv_c_wchar_t = no; then
|
|
HAVE_WCHAR_T=0
|
|
STDDEF_H=stddef.h
|
|
fi
|
|
AC_CACHE_CHECK([whether NULL can be used in arbitrary expressions],
|
|
[gl_cv_decl_null_works],
|
|
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stddef.h>
|
|
int test[2 * (sizeof NULL == sizeof (void *)) -1];
|
|
]])],
|
|
[gl_cv_decl_null_works=yes],
|
|
[gl_cv_decl_null_works=no])])
|
|
if test $gl_cv_decl_null_works = no; then
|
|
REPLACE_NULL=1
|
|
STDDEF_H=stddef.h
|
|
fi
|
|
if test -n "$STDDEF_H"; then
|
|
gl_CHECK_NEXT_HEADERS([stddef.h])
|
|
fi
|
|
])
|
|
|
|
AC_DEFUN([gl_STDDEF_MODULE_INDICATOR],
|
|
[
|
|
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
|
|
AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
|
|
GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
|
|
])
|
|
|
|
AC_DEFUN([gl_STDDEF_H_DEFAULTS],
|
|
[
|
|
dnl Assume proper GNU behavior unless another module says otherwise.
|
|
REPLACE_NULL=0; AC_SUBST([REPLACE_NULL])
|
|
HAVE_WCHAR_T=1; AC_SUBST([HAVE_WCHAR_T])
|
|
STDDEF_H=''; AC_SUBST([STDDEF_H])
|
|
])
|